The rainbow in an opal, the jardin of an emerald, the shimmering asterisk in a star sapphire—learn why gemologists call these "phenomena" or "inclusions" instead of "flaws."

Wide spacer bars and gemstone beads warm up the cool silvery tones of this bold bracelet design, while the toggle clasp gives it a secure finish.

It's no surprise that moss agate's plant-like filaments affect the perceived metaphysical properties of the stone. Moss agate is said to encourage tranquility and emotional balance.

These tree earrings are perfectly trimmed with decorative cones, moss agate gemstone beads and a Preciosa crystal sparkle on top.

The randomly spotted glass beads and antique copper-tone accents in this jewelry set give it a fun, boho vibe, with moss agate adding a bit of earthiness.